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Geometry and Kinematics of a Corrugated Fault Surface, Arkitsa, Greece
Geological Society of America Abstracts with Programs (2009)
  • Phillip G Resor, Wesleyan University
  • Vanessa E Meer, Duke University
Abstract

Fault surface geometry plays a critical role in fault and earthquake mechanics. We have quantified the geometry of the spectacular Arkitsa fault to explore the relationship between corrugations and incremental slip direction. A scan of the fault exposure with 1-m spatial resolution and mm-scale precision reveals corrugations that extend across the entire exposed surface and exhibit nearly self-similar scaling across ~3-20 m wavelengths. Corrugations are made up of 1-5 m wide synforms and antiforms with axes sub-parallel to the slip direction separated by nearly planar regions of similar width. The mean orientation of mm-scale striations is nearly parallel to the mean corrugation axis, yet striation orientation shows a statistically significant correlation with fault surface orientation. We interpret these results as evidence that slip-parallel corrugations perturb near-fault stresses and thus play an important role in fault mechanics.

Publication Date
2009
Citation Information
Phillip G Resor and Vanessa E Meer. "Geometry and Kinematics of a Corrugated Fault Surface, Arkitsa, Greece" Geological Society of America Abstracts with Programs Vol. 41 Iss. 3 (2009)
Available at: http://works.bepress.com/presor/9/